Vol. XXvi] ENTOMOLOGICAL NEWS. 239 



dunagtd in transit, and the female, now in the collection at the .\cad- 

 emy of Natural Sciences of Philadelphia was exhibited.* 



Orthoptera. — Mr. P. W. Whiting described experiments per- 

 formed upon Choriophaga tiridifasciata. This graMbopper. as is well 

 known, occurs in two color phasct, green and brown. The males are 

 almost exclusively of the brown phito. green males being very scarce. 

 Females occur in both phases qoite commonly. Experiments were 

 performed at the Bussey Institntioo of Harvard University by mating 

 brown with brown and green with green, also by croMHsatingt. This 

 produced all brown individnals irrespective of the parentage. The con- 

 ditions under which the yoong were reared were hot and dry. Later 

 the environmental conditioof were tested, and it was found that damp- 

 ness prodticed green individttals. In a few cases brown individuals 

 were shifted to green after an ekdytia. Green individuals always 

 shifted to brown when conditions were boC and dry. .At the Univer- 

 sity 6f Pennsylvania the conditions have been better controlled by 

 means of constant tem pe ra ture rooms, and here it is found that cool- 

 ncii and dampness produce green individnals, while heat and aridity 

 prodiice brown individaals. The Ugfater browns ap pa r ently are a step 

 in the direction of the ffreen since dark brown individuals become 

 lighter before they turn green. The work of Dr. Nabours shows that 

 pattern is hereditary. His experiments were performed upon Pora- 

 UlHx te xmuu. Nomouttvr apparently has the same color patterns as 

 Partttfttix texanus. It is intended to in ve sti g a te these shortly. Mr. 

 Rehn said work in the field corroborated Mr. Whiting's experimental 

 studies. 



Lapidopte r a. — Mr. I^urent exhibited a series of specimens of 

 Hypkantfia nmra (the fall web- worm moth) in which the maculation 

 of no two s pe ci m e n s was alflte. S pec i men Na i was pure white with- 

 out a spot, while in sp ec i m en i6k Uie m a c u latkm s were so numerous 

 that they gave the anterior wings a blackish appearance. In the ma- 

 jority of the moths the posterior wings were immaculate, only a few 

 showing any maculations. The speaker stated that the caterpillars 

 did not always remain in the 6rst web, increasing the sise of the web 

 natfl the caterpillars became full grown, bat tint often part of them 

 left the first wcb-Kke nest and spun a new one some distance from the 

 old one. From one-fourth to one-half of the caterpillars often de- 

 serted the old web. Mr. Williams exhibited mounts of the genitalia of 

 Emmtanu tUala. He said he had found a retractile brush be t ween the 

 genitalia and the last ahdomiwil segment This brush b apparendy 

 made up of modified scales. It is a male secondary sexual character. 



HajraY Skuiiiib, Stcrtltry. 



* This record has also been pubBsbed by Mr. E. U Plersoo. Proceed- 

 ings of the Thorcau Museum of Natural History, Middlesex School, 

 Concord, Mass^ Vol I, p. 41. Feb. iB. 1915—^ 



